Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
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Chapter 2.5, Problem 38STQ
Program Plan Intro
“System.exit()”:
- • The “System.exit ()” method is used to exit current
program by terminating running JVM (Java Virtual Machine). - • A status code is taken by this method. A non-zero value of status code is normally used to specify abnormal termination.
- • The “System.exit (0)” and “System.exit (1)” are the two declarations used to terminate the program in Java.
- ○ The “System.exit (0)” is a successful termination.
- ○ The “System.exit (1)” is an unsuccessful termination.
Explanation of Solution
“Yes”, the program would compile...
Explanation of Solution
Without “System.exit (0)” method:
“Yes”, the program would compile and run without any problem...
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Consider the following database for some store:
Customers (cid, cname, city, discount)Agents (aid, aname, city, percent)Products (pid, pname, city, quantity, price)Orders (ordno, mon, cid, aid, pid, qty, dollars)
The relation Customers records the ID (cid), name (cname), location (city) of each customer and a discount percentage (discount) for this customer.
The relation Agents records the ID (aid), name (aname), location (city) of each agent and a transaction fee (percent) charged by this agent.
The relation Products lists the ID (pid), name (pname), location (city), quantity and price of available products.
And finally, the relation Orders contains a unique order number (ordno), the month (mon), customer (cid), agent (aid), product (pid), quantity (qty) of each order as well as the total value (dollars) of the transaction.
1. Express the following query in SQL
(a) List customers (names) who do not have discounts but purchased at least one product of price greater than $50.
(b) Find…
Consider the following relational schema and briefly answer the questions that follow:
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
a. Define a table constraint on Dept that will ensure that all managers have age > 30.
b. Write SQL statements to delete all information about employees whose salaries exceed that of the manager of one or more departments that they work in. Be sure to ensure that all the relevant integrity constraints are satisfied after your updates.
Consider the following relations:
Student(snum: integer, sname: string, rmajor: string,
level: string, age: integer)
Class(cname: string, meets_at: time, room: string, fid: integer)
Enrolled(snum: integer, cname: string)
Faculty(fid: integer, fname: string, deptid: integer)
The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.
2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.
(a) Every faculty member must teach at least two courses.
(b) Every student must be enrolled in the course called 'Math101'.
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Chapter 2 Solutions
Java: An Introduction to Problem Solving and Programming (7th Edition)
Ch. 2.1 - Prob. 1STQCh. 2.1 - Can a Java program have two different variables...Ch. 2.1 - Prob. 3STQCh. 2.1 - Give the declaration for two variables of type...Ch. 2.1 - Write the declaration for two variables called...Ch. 2.1 - What is the normal spelling convention for named...Ch. 2.1 - Prob. 7STQCh. 2.1 - Prob. 8STQCh. 2.1 - Prob. 9STQCh. 2.1 - Prob. 10STQ
Ch. 2.1 - Prob. 11STQCh. 2.1 - In the Programming Tip entitled Type Casting a...Ch. 2.1 - What is the output produced by the following lines...Ch. 2.1 - What is the output produced by the following lines...Ch. 2.1 - Prob. 15STQCh. 2.1 - Prob. 16STQCh. 2.1 - Consider the following statement from the program...Ch. 2.1 - Prob. 18STQCh. 2.2 - Prob. 19STQCh. 2.2 - What output is produced by the following...Ch. 2.2 - What output is produced by the following...Ch. 2.2 - What output is produced by the following...Ch. 2.2 - What output is produced by the following...Ch. 2.2 - What output is produced by the following...Ch. 2.2 - What is the value of the expression sl.equals(s2)...Ch. 2.2 - What is the value of the expression s1.equals (s2)...Ch. 2.3 - Write Java statements that will cause the...Ch. 2.3 - What is the difference between the methods...Ch. 2.3 - Write a complete Java program that reads a line of...Ch. 2.3 - Write a complete Java program that reads one line...Ch. 2.3 - What output is produced by the following...Ch. 2.4 - Prob. 32STQCh. 2.4 - What is the output produced by the following Java...Ch. 2.4 - Although it is kind of silly, state legislatures...Ch. 2.5 - Prob. 35STQCh. 2.5 - Give a Java statement that will display a dialog...Ch. 2.5 - Give a Java statement that, when executed, will...Ch. 2.5 - Prob. 38STQCh. 2.5 - Write a complete Java program that produces a...Ch. 2.5 - Write a complete Java program that behaves as...Ch. 2 - Write a program that demonstrates the approximate...Ch. 2 - Write a program that demonstrates type casting of...Ch. 2 - Write a program that demonstrates the operator %...Ch. 2 - If u = 2, v = 3, w = 5, x = 7, and y = 11, what is...Ch. 2 - What changes to the ChangeMaker program in Listing...Ch. 2 - If the int variable x contains 10, what will the...Ch. 2 - Write some Java statements that use the String...Ch. 2 - Prob. 8ECh. 2 - Prob. 9ECh. 2 - Write a single Java statement that will display...Ch. 2 - What does the Java code Scanner keyboard = new...Ch. 2 - What does the Java code Scanner keyboard = new...Ch. 2 - Prob. 13ECh. 2 - Many sports have constants embedded in their...Ch. 2 - Prob. 15ECh. 2 - Define named constants that you could use in...Ch. 2 - Write a program that reads three whole numbers and...Ch. 2 - Write a program that uses Scanner to read two...Ch. 2 - Write a program that reads the amount of a monthly...Ch. 2 - Write a program that reads a four-digit integer,...Ch. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Write a program that converts degrees from...Ch. 2 - Write a program that reads a line of text and then...Ch. 2 - Write a program that will read a line of text as...Ch. 2 - Write a program that asks the user to enter a...Ch. 2 - Write a program that determines the change to be...Ch. 2 - Write a program that reads a 4-bit binary number...Ch. 2 - Prob. 7PPCh. 2 - The Harris-Benedict equation estimates the number...Ch. 2 - Repeat any of the previous programming projects...Ch. 2 - Write a program that reads a string for a date in...Ch. 2 - It is important to consider the effect of thermal...
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